Jul 27, 2009

A good friend tells you that a certain 'John Nevermet' is an introverted professional and is either an actuary or a salesman.

Which one do you think John most probably is?

If your first thought was: an actuary, congratulations(!), you just got caught in what is called a classical

Thinking Trap

Most people - not actuaries of course ;-) - are tempted to think John is almost certainly an actuary.On the other hand, they think of a salesman as 'outgoing', 'extrovert' or maybe 'pushy', but certainly not as 'introvert'. Wrapped up : John is an actuary....

Sorry, but - as you know - this logic conclusion is definitely wrong. It neglects the fact that salesmen outnumber actuaries at most 100 to 1. Before you would even start to consider John's character, you should have concluded that even when all the actuaries were introvert, there would only be a small 1% probability that John is actually an actuary (only in the unlikely case that less than 1% of the salesmen would be introvert, this option would be logically to consider).

On his blog Litemind, Luciano explains in a 5 minute 'must read' called 'How to Foolproof Your Mind' the next interesting and most harmful Thinking Traps, including suggestions on how to avoid each one of them. :

Anchoring Trap: Over-Relying on First ThoughtsYour starting point can heavily bias your thinking

Can you tell what's going wrong here?Yes? Then get ready for the next fallacy phase.

Although there a complete list of fallacies, another new interesting subset could be defined as 'Actuarial Fallacies'....

Actuarial FallaciesExcept for a 1988 homonymous, humorous intended, nevertheless still actual and relevant document by Charles L. McClenahan, nothing much has been published on actuarial fallacies.

Apparently fallacies are not an issue on the Actuarial Globe.

Therefore, I'll confine my remarks to a few actuarial events, of which each one could easily be nominated for the fictional 'Grand Actuarial Fallacy Prize':

Longevity risk can be easily managedLongevity slowly but steadily increases. It's not a yearly smashing or impressing risk, but over the years it has the characteristics of a killing sniper: when you finally discover the accumulated longevity loss after a few years, it's almost too late to handle and take appropriate measures.Actuaries could have foreseen a few decades ago that the average life span would keep rising and adequate measures had to be taken at once. Instead, actuaries failed to catch the implications of the rise in longevity and were caught by the proverbial 'boiling frog effect'. In short: actuaries failed to act in time....

Credit CrisisActuaries have failed in foreseeing the credit crisis. We have greatly underestimated the developments and put our head in the sand. We have trusted business plans promising ROEs of 15% and more.Read more in Actuary-Info's : "Wir haben es nicht gewußt!"

VAR ModelAs an article in The Actuary shows, we got intimidated and overruled by the 'magic' quants with their Value at Risk (VaR) models. We did and do know better as actuaries, but missed the boat. Actuaries should be more than professionally trained in giving 'push back'.

The relationship between risk and returnAs we know this risk-return relationship is central to strategy research and practice.

In measuring risk as the variance of a series of accounting-based returns, Bowman obtained the puzzling result of a negative association between risk and mean return.The expected positive association between risk and return turns out to be elusive.

So that we can conclude that there is at least a small chance that an imperfect actuary may draw the right conclusion.

That's why it's better to work with an imperfect actuary.

Client QuoteAs we know, clients are always right. Remarkably, the next client quote seems to stress the mentioned successful outcome of the imperfect actuary:I once had an actuary tell me that, because the future is uncertain, his numbers were almost certainly wrong, but he believed they were less wrong than guessing outcomes with no analysis.

You think - by now - you know everything about fallacies?Well, test it by taking the next fallacy Quiz:

Disclaimer

Maggid is an actuarial professional, and like every actuarial professional or human being, he makes mistakes. Maggid encourages you to do your own independent "due diligence" on any idea that he talks about, because he could be wrong.

Nothing written here, or in my writings at Actuary-Info is an invitation to undertake whatsoever action, in particular to buy or sell any particular security; at most, Maggid is handing out educated guesses as to what the markets may do. Maggid thinks that "The markets always find a new way to make a fool out of you", and so he encourages caution with every action, in particular in investing. Risk control wins the game in the long run, not bold moves.

Additionally, Maggid may occasionally write about accounting, actuarial, insurance, and tax or other specialized topics, but nothing written here or on Actuary-Info is meant to be a formal "advice" in those areas. Consult a reputable professional in those areas to get personal, tailored advice that meets the specialized needs that Maggid can have no knowledge of.

The next additional general Disclaimer is also applicable with regard to Actuary-Info.